Sheave Diam. 2 5/32 in. Max. Rope Diam. 3/8 in. Max. Wire Diam. - in. Pin Diam. - in. Max. Working Load 1650 lb Breaking Load 3300 lb Weight 12.2 oz * Total block load. Maximum MWL load on becket not to exceed 15% of block load. Ie. 117kg (257lb), BL 234kg (514lb). Equates to block MWL in 6:1 system. Attachment of an additional block, to the becket must not exceed the becket M.W.L. Attachment of a shackle to the becket will reduce the M.W.L. due to the point loading affect.